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+--- Thread: [SUGGESTION] Two improvements in percentile calculations (/showthread.php?tid=4028)
Two improvements in percentile calculations - afullo - 03-24-2013
Hi all, can I report some considerations about percentile calculations?
1. The percentile formula is probably written as 1-p/n, instead of 1-(p-1)/(n-1). Players ranked 1 in their respective ladder should in fact have a percentile of 100.00, while they have a slightly lower number (and the difference is circa 1/n). Players ranked last (excluding what I say in 2.) have a 0.00 percentile, so I think the denominator is at the moment n (and not n-1).
2. n should be the total number of players ranked in the considered ladder, not the last position listed. That's because in any ladder there are a lot of players with the same ELO of 100.00, and then ranked pari merito with the same position number. If a player is the first above them, he shouldn't have a nearly zero percentile, because he is stronger than all of them.
Thanks.
RE: Two improvements in percentile calculations - zykure - 03-27-2013
Hey afullo, just so that you know your suggestion isn't ignored: http://dev.xonotic.org/issues/1462
It will be fixed after the next upgrade i guess.
RE: Two improvements in percentile calculations - Mr. Bougo - 03-27-2013
Note that you can get an account on the bug tracker and click "watch" to get an email notification whenever this issue is updated.
RE: Two improvements in percentile calculations - afullo - 03-28-2013
Ok, thanks, I stay tuned.